Question

which of the following describes fat utilization during physical activity?
a. fat that is stored closest to the exercising muscle is oxidized first.
b. fat oxidation makes more of a contribution as the intensity of the exercise increases.
c. fat represents the major fuel source during sustained, moderate activity.
d. fat is burned in higher quantities during short, high-intensity exercises than prolonged, low-intensity exercises.

Explanation:

• Option a: Fat utilization isn't determined by proximity to exercising muscle; other factors like energy demand and availability matter.
• Option b: As exercise intensity increases, the body relies more on carbohydrates, so fat oxidation's contribution decreases.
• Option c: During sustained, moderate activity, fat is the major fuel source as it provides a steady energy supply over time.
• Option d: Short, high - intensity exercises rely more on carbohydrates, while prolonged, low - intensity exercises use more fat.

Answer:

c. Fat represents the major fuel source during sustained, moderate activity.